Updates Tamil, Sinhala and Bengali font sizes to UX specification

PR: #100
Required for the bbc/morph-modules#41912

Update Arabic Qalam typography

PR: #99
Bumped in morph-grandstand: https://github.com/bbc/morph-modules/pull/40020
Required for: https://github.com/bbc/morph-modules/pull/39891

Reduced motion helper

Util class for reducing motion on devices where reduced motion is enabled.

.gs-u-reduce-motion

Updated social colours

Use latest (2018) social media colours according to relevant brand guidelines

Alt++ spacing

Merge pull request #91 from bbc/update-non-latin-dists

update dist to include flips

Remove Ethiopic script placeholder

Merge pull request #84 for WS2020

Related:
This release affectively reverts #82.
Further work to correctly handle the ethiopic script will be done as part of https://jira.dev.bbc.co.uk/browse/WS2020-743

Add Ethiopic script placeholder

Merge pull request #82 for WS2020

Related:
PR - ws-alephamp-queue-renderer
WS2020-578

Use gs-sass-tools @ ^5.0.3 to pull in new sport colours

Merge pull request #80 from bbc/task_add_sport_new_colours

Task add sport new colours

Use gs-sass-tools @ ^5.0.2 to pull in gel-grid @ ^3.0.0

#79

IE improvements to faux block link

Includes #78